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研究影响浸水高土石路堤稳定性的主要因素,可以为沿河或库区路堤设计提供理论依据。采用正交试验设计方法制定数值模拟计算方案,研究了路堤高度、坡率、次级边坡高度和水位降幅对水位骤降后高土石路堤稳定性的影响,得出各影响因素的重要性由大到小是:水位降幅;坡率;次级边坡高度;路堤高度。在这几个影响因素中,水位降幅对浸水高土石路堤稳定性的影响最大,它的贡献率是69.26%;路堤高度对浸水高土石路堤稳定性的影响最小,它的贡献率仅为1.94%。比较分析计算结果,得出路堤边坡越陡、次级边坡越高、水位降幅越大,水位骤降后高土石路堤越不稳定;但不是路堤越高,水位骤降后路堤稳定性越差。
Studying the main factors affecting the stability of soaked embankment can provide theoretical basis for embankment design along river or reservoir. The orthogonal experimental design method is used to develop the numerical simulation scheme. The influence of embankment height, slope, secondary slope height and water level drop on the stability of high earth embankment after water level plunge is studied. The importance of each influencing factor is obtained from Big to small is: water level decline; slope rate; secondary slope height; embankment height. Among these influencing factors, the declining water level has the greatest impact on the stability of soaked embankment with a contribution rate of 69.26%. The embankment height has the least influence on the stability of soaked embankment with a contribution rate of only 1.94% . The results of comparative analysis and calculation show that the steeper the embankment slope, the higher the secondary slope, the greater the decrease of water level, the more instability of embankment after the water level plunged; but not the higher embankment, the stability of embankment after the plunge of water level difference.